US20110024661A1 - Butterfly valve, preferably for a blow off circuit of a gas turbine plant - Google Patents

Butterfly valve, preferably for a blow off circuit of a gas turbine plant Download PDF

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Publication number
US20110024661A1
US20110024661A1 US12/845,834 US84583410A US2011024661A1 US 20110024661 A1 US20110024661 A1 US 20110024661A1 US 84583410 A US84583410 A US 84583410A US 2011024661 A1 US2011024661 A1 US 2011024661A1
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US
United States
Prior art keywords
disc
butterfly valve
annular
sealing ring
annular seat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/845,834
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English (en)
Inventor
Claudio Dotta
Fabrizio Ferrari
Luciano Massalin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ansaldo Energia SpA
Original Assignee
Ansaldo Energia SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ansaldo Energia SpA filed Critical Ansaldo Energia SpA
Assigned to ANSALDO ENERGIA S.P.A. reassignment ANSALDO ENERGIA S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DOTTA, CLAUDIO, FERRARI, FABRIZIO, Massalin, Luciano
Publication of US20110024661A1 publication Critical patent/US20110024661A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F02D9/104—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing
    • F02D9/1045—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing for sealing of the flow in closed flap position, e.g. the housing forming a valve seat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226—Shaping or arrangements of the sealing
    • F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat

Definitions

  • the present invention relates to a butterfly valve, preferably for a blow off circuit of a gas turbine plant.
  • Gas turbine plants comprise a compressor, a combustion chamber, a gas turbine and a blow off circuit, which connects the compressor to the gas turbine.
  • the blow off circuit comprises several extraction lines for extracting air from the compressor and discharging it at the discharge of the gas turbine to avoid a stalling condition of the compressor, commonly named “pumping.” Pumping is a very dangerous condition for compressors because it determines the onset of vibrations and overheating of the components, which can seriously damage the plant.
  • a butterfly valve commonly named “blow off valve,” is adapted to cut off the air flow between the compressor and the turbine exhaust arranged along each extraction line.
  • the butterfly valves In normal operating conditions with the turbine running, the butterfly valves are closed and must guarantee a practically perfect sealing to allow air to flow exclusively into the compressor without penalizing efficiency. In particular operating conditions, however, the butterfly valves must open very rapidly to allow the extraction of air from the compressor and to prevent the pumping condition of the compressor.
  • Butterfly valves of known type comprise a supporting ring, which defines a fluid flow section, a sealing ring and a disc, which is mobile between a valve closing position, in which the disc obstructs the flow section and a valve opening position, in which the disc does not obstruct the flow section allowing the flow of fluid.
  • Butterfly valves of this type have shown malfunctions during operation along the extraction lines due to the onset of bonding phenomena between the sealing ring and the disc, commonly indicated with the term “jamming.”
  • the jamming between the sealing ring and the disc compromises the opening of the valve in critical moments in which air must be immediately extracted from the compressor to prevent pumping.
  • the present invention relates to a butterfly valve, preferably for a blow off circuit of a gas turbine plant, comprising: a supporting ring having an inner perimeter edge defining a fluid flow section and an annular seat arranged along the inner perimeter edge; a disc, which is pivoted to the supporting ring and is mobile between a valve closing position, wherein the disc obstructs the fluid flow section, and a valve opening position, wherein the disc does not obstruct the fluid passage section allowing the flowing of the fluid; a sealing ring partially housed in the annular seat and adapted to abut against a peripheral edge of the disc when the disc is in the valve closing position; the sealing ring comprising an inner annular portion, which is contained in the annular seat, and a projecting annular portion, which projects radially from the annular seat; the valve being characterized in that the projecting annular portion of the sealing ring is hollow.
  • FIG. 1 is a diagrammatic view of a gas turbine system comprising at least one butterfly valve according to the present invention
  • FIG. 2 is a perspective, exploded view with parts removed for clarity of a butterfly valve according to the present invention
  • FIG. 3 is a section view, with parts removed for clarity, of the butterfly valve in FIG. 2 ;
  • FIG. 4 is a section view, with parts removed for clarity, of a first detail of the butterfly valve in FIGS. 3 ;
  • FIG. 5 is a section view, with parts removed for clarity, of a second detail of the butterfly valve in FIG. 3 .
  • reference numeral 1 indicates as a whole a gas turbine plant for the production of electricity comprising a compressor 2 , a combustion chamber 4 , a gas turbine 5 which feeds a generator 7 mounted on the same shaft 8 of the gas turbine 5 and is adapted to deliver a power p, and a blow off circuit 9 , which is provided with a plurality of extraction lines 11 and with a plurality of butterfly valves 12 , each of which is arranged along a respective extraction line 11 .
  • extraction lines 11 there are four extraction lines 11 and four butterfly valves 12 .
  • the extraction lines 11 put into communication a stage of the compressor 2 , preferably one of the first stages, e.g. the fifth, with a discharge section 15 of the gas turbine 5 .
  • the opening of one of the butterfly valves 12 under the bias of a respective hydraulic actuation device determines the discharge of a given air flow from the compressor 2 to the discharge section 15 of the gas turbine 5 .
  • the opening of one or more butterfly valves 12 is necessary in some steps of operating of the plant 1 to prevent the pumping of the compressor 2 .
  • the opening of the butterfly valves 12 is fundamental during the steps of starting up of the plant 1 , because during these steps the pumping of the compressor 2 may cause considerable damage to the plant 1 .
  • each butterfly valve 12 comprises a supporting ring 18 , defined by two coupled annular elements 19 and 20 , a sealing ring 22 and a disc 23 .
  • the supporting ring 18 has an outer perimeter edge 24 and an inner perimeter edge 25 , which defines a fluid flow section 27 .
  • the fluid is air from the compressor 2 flowing in a direction D (indicated in the appended figure by an arrow).
  • the annular elements 19 and 20 are shaped and coupled to one another so as to create an annular seat 29 arranged along the inner perimeter edge 25 of the supporting ring 18 and adapted to be engaged by the sealing ring 22 .
  • the annular seat 29 is defined by a first and a second annular side face 31 a and 31 b, which extend in radial direction and are opposite to one another and an annular bottom surface 32 .
  • the radial length of the first annular side face 31 a is shorter than the radial length of the second annular side face 31 b.
  • the sealing ring 22 is partially housed in the annular seat 29 and comprises an inner annular portion 34 , which is contained in the annular seat 29 , and a projecting annular portion 35 , which protrude in radial direction from the annular seat 29 .
  • projecting annular portion 35 means the portion of sealing ring 22 which projects with respect to the first side face 31 a (as shown by the dashed line in FIG. 4 ).
  • the sealing ring 22 has a cross section which is substantially “U” shaped so as to define an open annular cavity 38 , which extends inside the inner annular portion 34 and the projecting annular portion 35 .
  • the cross section of the sealing ring 22 comprises two parallel arms 36 and a curved portion 37 .
  • Each arm 36 is defined by a flat inner face 39 , by a flat base face 40 and by an outer face 41 comprising a flat central portion 43 parallel to the inner face 39 and two convex lateral portions 44 .
  • the flat central portions 43 are arranged in use in contact with respective first annular and second annular side faces 31 a and 31 b of the annular seat 29 .
  • the flat central portions 43 are parallel to the annular side faces 31 a and 31 b of the annular seat 29 so that, in use, there is a substantially uniform contact between the sealing ring 22 and the annular seat 29 to guarantee an optimal sealing and prevent the flow of fluid.
  • the convex lateral portions 44 avoid the presence of sharp edges and thus avoid the sealing ring 22 from penetrating in the annular seat 29 in the contact points following the thermal distortions and the pushing actions which occur during use.
  • the curved portion 37 of the cross section of the sealing ring 22 is comprised in the projecting annular portion 35 and, in use, abuttingly cooperates against the disc 23 when, as will be described in greater detail below, the disc 23 is in the valve closing position.
  • the thickness of the curved portion 37 is such to confer a radial flexibility to the curved portion 37 sufficient to guarantee an optimal tightness between disc 23 and sealing ring 22 .
  • the curved portion 37 has a thickness lower than the greater thickness of the arms 36 .
  • the annular cavity 38 confers elasticity and flexibility to the sealing ring 22 , which can radially deform to guarantee the tightness and, at the same time, to avoid jamming between disc 23 and sealing ring 22 .
  • the material with which the sealing ring 22 is made is a material having the same thermal expansion coefficient as the disc 23 . In this manner, the risk of jamming between disc 23 and sealing ring 22 is reduced in case of strong thermal stress.
  • the disc 23 is hinged to the support ring 18 , in particular to the annular element 20 , and has a diameter substantially equal to the diameter of the inner perimeter edge 25 of the supporting ring 18 .
  • the disc 23 has a perimeter edge 45 and is provided, along the perimeter edge 45 , with two eyelets 46 arranged diametrically opposite and adapted to be engaged by a pin (not shown in the appended figures) fixed to two holes 47 (only one of which is visible in FIG. 2 ) of the annular element 20 of the supporting ring 18 .
  • the disc 23 turns about the pin between a valve closing position (shown in FIG. 3 ), in which the disc 23 obstructs the flow section 27 and cooperates with the sealing ring 22 and a valve opening position, in which the disc 23 does not obstruct the flow section 27 allowing the flow of fluid.
  • a valve closing position shown in FIG. 3
  • the perimeter edge 45 of the disc 23 is abuttingly arranged against the projecting portion 35 of the sealing ring 22 .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lift Valve (AREA)
US12/845,834 2009-07-29 2010-07-29 Butterfly valve, preferably for a blow off circuit of a gas turbine plant Abandoned US20110024661A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001345A ITMI20091345A1 (it) 2009-07-29 2009-07-29 Valvola a farfalla, preferibilmente per un circuito di sfiato di un impianto a turbina a gas
ITMI2009A001345 2009-07-29

Publications (1)

Publication Number Publication Date
US20110024661A1 true US20110024661A1 (en) 2011-02-03

Family

ID=41684205

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/845,834 Abandoned US20110024661A1 (en) 2009-07-29 2010-07-29 Butterfly valve, preferably for a blow off circuit of a gas turbine plant

Country Status (3)

Country Link
US (1) US20110024661A1 (it)
EP (1) EP2295836A1 (it)
IT (1) ITMI20091345A1 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113864468A (zh) * 2021-10-13 2021-12-31 上海一核阀门股份有限公司 一种u型圈金属密封蝶阀及其制备方法

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3030066A (en) * 1957-10-24 1962-04-17 David F Wiseman & Sons Ltd Butterfly valves
US3076631A (en) * 1960-07-18 1963-02-05 Grove Marvin Henry Valve construction with hollow resilient sealing means
US3080145A (en) * 1957-10-24 1963-03-05 David F Wiseman & Sons Ltd Butterfly valves
US3544066A (en) * 1967-01-03 1970-12-01 Pratt Co Henry Valve seat structure
US3612483A (en) * 1968-04-12 1971-10-12 Rockwell Mfg Co Valves with deformable sealing
US3986699A (en) * 1974-07-02 1976-10-19 Posi-Seal International, Inc. Positive shut-off seal
US4037819A (en) * 1976-03-03 1977-07-26 Kamyr Valves Inc. Butterfly valve having metal-to-metal sealing with conical angle-transported vane
US4058290A (en) * 1975-04-15 1977-11-15 Neles Oy Gate valve
US4081891A (en) * 1975-12-24 1978-04-04 Acf Industries, Incorporated Method of making a valve
FR2559232A1 (fr) * 1984-02-03 1985-08-09 Rollot Andre Vanne a papillon spherique
US4540457A (en) * 1983-03-09 1985-09-10 Lavalley Industrial Plastics, Inc. Butterfly valve with pressurized O-ring sale
US4826133A (en) * 1987-08-17 1989-05-02 Georg Fischer Ag Seal arrangement for flap valve
US5294091A (en) * 1989-10-06 1994-03-15 Keystone International Holdings Corp. Stop cock for a liquid container
JPH1026235A (ja) * 1996-07-12 1998-01-27 Kubota Corp バタフライ弁
US6029949A (en) * 1995-04-17 2000-02-29 Flowserve Corporation High performance butterfly valve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1181609A (fr) * 1957-08-23 1959-06-17 Vanne-papillon

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080145A (en) * 1957-10-24 1963-03-05 David F Wiseman & Sons Ltd Butterfly valves
US3030066A (en) * 1957-10-24 1962-04-17 David F Wiseman & Sons Ltd Butterfly valves
US3076631A (en) * 1960-07-18 1963-02-05 Grove Marvin Henry Valve construction with hollow resilient sealing means
US3544066A (en) * 1967-01-03 1970-12-01 Pratt Co Henry Valve seat structure
US3612483A (en) * 1968-04-12 1971-10-12 Rockwell Mfg Co Valves with deformable sealing
US3986699A (en) * 1974-07-02 1976-10-19 Posi-Seal International, Inc. Positive shut-off seal
US4058290A (en) * 1975-04-15 1977-11-15 Neles Oy Gate valve
US4081891A (en) * 1975-12-24 1978-04-04 Acf Industries, Incorporated Method of making a valve
US4037819A (en) * 1976-03-03 1977-07-26 Kamyr Valves Inc. Butterfly valve having metal-to-metal sealing with conical angle-transported vane
US4540457A (en) * 1983-03-09 1985-09-10 Lavalley Industrial Plastics, Inc. Butterfly valve with pressurized O-ring sale
FR2559232A1 (fr) * 1984-02-03 1985-08-09 Rollot Andre Vanne a papillon spherique
US4826133A (en) * 1987-08-17 1989-05-02 Georg Fischer Ag Seal arrangement for flap valve
US5294091A (en) * 1989-10-06 1994-03-15 Keystone International Holdings Corp. Stop cock for a liquid container
US6029949A (en) * 1995-04-17 2000-02-29 Flowserve Corporation High performance butterfly valve
JPH1026235A (ja) * 1996-07-12 1998-01-27 Kubota Corp バタフライ弁

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113864468A (zh) * 2021-10-13 2021-12-31 上海一核阀门股份有限公司 一种u型圈金属密封蝶阀及其制备方法

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Publication number Publication date
ITMI20091345A1 (it) 2011-01-30
EP2295836A1 (en) 2011-03-16

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Date Code Title Description
AS Assignment

Owner name: ANSALDO ENERGIA S.P.A., ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DOTTA, CLAUDIO;FERRARI, FABRIZIO;MASSALIN, LUCIANO;REEL/FRAME:025229/0100

Effective date: 20100922

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION